Zobrazeno 1 - 10
of 75
pro vyhledávání: '"Scherfner, Mike"'
Publikováno v:
In Reports on Mathematical Physics June 2023 91(3):409-422
We formulate the concept of time machine structure for spacetimes exhibiting a compactely constructed region with closed timelike curves. After reviewing essential properties of the pseudo Schwarzschild spacetime introduced by A. Ori, we present an a
Externí odkaz:
http://arxiv.org/abs/1111.2822
We review a theorem by Hasse and Perlick establishing a result characterizing parallax-free cosmological models via three equivalent properties -- namely the existence of a redshift potential, the existence of a conformal vector field parallel to the
Externí odkaz:
http://arxiv.org/abs/0802.3642
Publikováno v:
Class.Quant.Grav.20:1103-1114,2003
We describe exact cosmological solutions with rotation and expansion in the low-energy effective string theory. These models are spatially homogeneous (closed Bianchi type IX) and they belong to the family of shear-free metrics which are causal (no c
Externí odkaz:
http://arxiv.org/abs/gr-qc/0302027
Publikováno v:
Phys.Rev. D66 (2002) 043518
We demonstrate the existence of shear-free cosmological models with rotation and expansion which support the inflationary scenarios. The corresponding metrics belong to the family of spatially homogeneous models with the geometry of the closed univer
Externí odkaz:
http://arxiv.org/abs/gr-qc/0206080
Publikováno v:
Phys.Rev. D63 (2001) 104014
A new solution for the stationary closed world with rigid rotation is obtained for the spinning fluid source. It is found that the spin and vorticity are locally balanced. This model qualitatively shows that the local rotation of the cosmological mat
Externí odkaz:
http://arxiv.org/abs/gr-qc/0103015
Publikováno v:
In Differential Geometry and its Applications 2007 25(6):594-611
Akademický článek
Tento výsledek nelze pro nepřihlášené uživatele zobrazit.
K zobrazení výsledku je třeba se přihlásit.
K zobrazení výsledku je třeba se přihlásit.
Akademický článek
Tento výsledek nelze pro nepřihlášené uživatele zobrazit.
K zobrazení výsledku je třeba se přihlásit.
K zobrazení výsledku je třeba se přihlásit.
Publikováno v:
Asian J. Math. 9, no. 1 (2005), 065-078
We consider minimal closed hypersurfaces $M^4\subset \mathbb{S}^5(1)$ with constant scalar curvature. We prove that, if $M^4$ is additionally a Willmore hypersurface, then it is isoparametric. This gives a positive answer to the question made by Cher
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=project_eucl::70009e316975f61c83fa3500c0402e31
http://projecteuclid.org/euclid.ajm/1118689226
http://projecteuclid.org/euclid.ajm/1118689226